ALLO Boss

Diy? Low-budget? Esoterics? Let's discuss about DACS!

Ads helps Volumio remain Free and Open Source. Please consider donating to help us continue to serve you.

ALLO Boss

Postby Silvano17 » Wed Mar 28 2018 06:36

Hi, I recently bought an Allo BOSS Player (Allo BOSS DAC, Raspberry PI 3, Allo Case, Micro SD Card 8GB, 5V 2A Power Supply), which I'm really satisfied with. Volumio is fantastic, it sounds wonderful, but I would like to know if I can keep the connection to the Raspberry, via USB, of an external HD not self-powered or if I have to power it autonomously. Thanks in advance
Random avatar
Silvano17
Fresh off the boat
Fresh off the boat
 
Posts: 2
Joined: Sat Mar 10 2018 10:24

Ads helps Volumio remain Free and Open Source. Please consider donating to help us continue to serve you.


ALLO Boss +Display

Postby Fonzie » Fri Jan 25 2019 10:31

Hello,
I would like to build a player and I sure need one with a Display, touchscreen preferred. The Allo Dacs obviously seem that they do not provide the full range of GPIO Pins. Can I attach any Screen on top of the Boss Player?
Random avatar
Fonzie
Fresh off the boat
Fresh off the boat
 
Posts: 1
Joined: Fri Jan 25 2019 10:24


ALLO Boss +Display

Postby Yatsushiro » Fri Jan 25 2019 14:46

Fonzie wrote:Hello,
I would like to build a player and I sure need one with a Display, touchscreen preferred. The Allo Dacs obviously seem that they do not provide the full range of GPIO Pins. Can I attach any Screen on top of the Boss Player?


If you choose an HDMI screen with a USB interface for the touch (such as Waveshare 5" or 7" etc) then you don't need to go anywhere near the GPIO pins.

https://www.waveshare.com/7inch-hdmi-lcd-c.htm
Random avatar
Yatsushiro
Serious Listener
Serious Listener
 
Posts: 68
Joined: Thu Dec 01 2016 16:29


ALLO Boss

Postby aconst » Fri Jan 25 2019 15:15

I would use the original Raspberry Pi 7" display.
It works in my IQ Audio stack and does not need the GPIO pins excepting the power supply.
If you can find which of the available pins have the 5 V required you just use the connectors provided with the touch screen.
Random avatar
aconst
Serious Listener
Serious Listener
 
Posts: 66
Joined: Fri Jul 28 2017 07:33


ALLO Boss

Postby cuchu » Sun Apr 07 2019 06:29

michelangelo wrote:As you know, since Allo stepped into the SBC related audio scene, they proved to be a constant source of satisfaction. So, when they told me they had a new "Master DAC" under works, well, I just wanted to listen to it.
The time has come and now I have their latest BOSS DAC playing with Volumio in my system.

So, what does "Master DAC" mean? Basically, a master DAC does not take the clock from the PI itself but rather uses a separate clock (oscillators, 2 are needed, one for 22hz and 24hz and their multiples). This is nothing particularly fancy, as almost any I2S DAC uses this approach.
The clever bits of their design comes from the fact that they added some clever stuff under the hood:

- 3 different power rails, with individual filtering. One for the DAC chip itself and the digital side, one for the analog stage and one for the oscillators. On paper, this should translate with very very low noise floor and better clock accuracy
- Film capacitors on the output stage to reduce distortion, coupled with a super-capacitor to enhance bass representation
- Good oscillators

Allo suggests at least 50 hours of break-in before critical listening (I guess the super capacitor is the reason they suggest this). I'm not deeply concerned of burn in generally, but I left it playing music for a couple of days before listening to it, just in case.

By listening to it, seems that Allo did it again. If we want to make it short, I love how it sounds. The bass is punchy and present but yet very controlled. This is the best bass I've heard from any I2S DAC.
That does not mean this DAC has a "dark" sound signature since it delivers a balanced reproduction.
Another very evident feature is that its dead silent. There is no noise whatsoever, therefore dynamics and detail are really standing out. And I mean it: the instrumental separation and level of detail is one of the best I've ever heard.
As for its sound signature, I think its very neutral, just with a little more bass than you would expect. Which for me, is a good thing.
Acoustic guitars and bass guitars are just fantastic with the BOSS.

To give you some comparisons, I think this can be considered a Kali + Piano on steroids: it has the same sound signature, with a bit more bass, details and overall balance but a bit less focused stereo image.

Last, my personal favorite feature of this DAC is that it delivers an engaging musical representation. I found myself repeatedly beating my foot following the rhythm of the music, and
I got really involved in the emotional part of music during my listenings. I know some of you might think I'm talking audiophile's bullshit, but this part of the musical message
for me is quite important and recognizable. Mark Wheeler from TNT, can surely describe such phenomenon better than me, and he calls it PRaT ( http://www.tnt-audio.com/edcorner/prat_e.html ).
Altough this term was introduced in the good old days of turntables, it describes quite well the ability of a system to foster appreciation and enjoyment of music.
And the BOSS does exactly that.

Allo, bravi!

The playlist of the test

Bob Dylan - Blowing in the Wind
Waldeck - Get Up.. Carmen
Metronomy - The look
Red Hot Chilli Peppers - I could have lied
Rodriguez - Sugar man
Rino Gaetano - Cogli la mia rosa d'amore
Alabama Shakes - Don't wanna fight
The Alan Parsons Project - Mammagamma
Whomadewho - Every minute alone
Led Zeppelin - Since I've been loving you
Pink Floyd - One of these days
Sebastian Tellier - La ritournelle
The Offspring - Pay the man
Tom Waits - Clap Hands
The Beatles - I want you (she's so heavy)
The Rapture - In the grace of your love


Hi! Thank you much for your review and recommendations. I've read the 24 pages and I still have a question:
How do you power the Rpi and the Boss? Wich psu do you recommend?

It seems the best way (in terms of sound quality) is powering the Rpi and the Boss separatedly.

To power th Rpi I have the Raspberry Pi Universal Power SUPPLY https://www.raspberrypi.org/products/ra ... er-supply/

To power the Boss I don't know between these two options:

Allo 5v power supply (13€)
https://www.allo.com/sparky-eu/5v-power ... #downloads

Ifi Ipower (51,40€)
https://volumio.org/product/ifi-ipower/

I hope somebody could answer. Does the Ifi Ipower make a huge improvement? Dies it worth the money?

Thanks a lot!
Random avatar
cuchu
Fresh off the boat
Fresh off the boat
 
Posts: 2
Joined: Sat Apr 06 2019 06:00


ALLO Boss

Postby DipterePow » Wed Jul 17 2019 09:55

Hi everyone!
I've got an "ALSA failed to open..." error message with my Boss DAC. I looked for the forum to find a solution but I did not find something really clear. It seems this problem could come from the PSU: if there is not enough volts to feed the Boss it can't read audio files. Ok, that makes sense. But what is the ideal electrical voltage needed? 5,05V, 5,12V...? I looked for the internet but I did not find the information.
Notice I use a DIY double PSU for my system: this toroïdal: https://www.audiophonics.fr/fr/transformateurs-toriques/transformateur-torique-60va-2x8v-p-10640.html
and this regulator: https://www.audiophonics.fr/fr/alimentations-regulees/module-d-alimentation-lineaire-regulee-double-dc-lt1083-24v-5a-p-11793.html
Boss DAC is feed separately and nothing else is connected to this output. My micro usb cables are optimized for more than 3,5 AMP(tested on the RPi 3B+ which feeds a touchscreen and a group of three 5V fans).

In parallel to this it could be that my DAC connection is not good: I deported my DAC from the RPi to have access to the GPIO. So I connected the PINS rated as ponds used by the DAC to the GPIO on the Boss tech manuel (blue highlighted lines)

Image

I don’t think I’ve forgotten anything(these 6 PINS are well connected), but as they say, "error is human"...
Can someone help me to find the issue?...
Thanks in advance!
User avatar
DipterePow
Sunday DIYer
Sunday DIYer
 
Posts: 49
Joined: Wed Mar 07 2018 08:42
Location: Under the old great tree. France.


ALLO Boss

Postby rost21A » Thu Jul 18 2019 06:50

Hello
I also use separate power supplies, it works perfectly. (see signature)
5.05V are good!
Does the streamer work normally with a normal power supply on the RPI (+ BOSS)?
If you supply the rpi and the BOSS separately with 5V, did you remove the connection Jumper J2.S on the BOSS next to the USB port?
Which software version do you use?
Is the BOSS Dac configured correctly in Volumio?
Did you make adjustments in the software?

regards
rost21A
Rasperry Pi 2 / 3
Connected to Allo Boss DAC 1.2 (with dual Ultra low noise Power supply from DIYINHK, 0.8uV (LT3042), iFi-Audio iPower)
Hypex nCore 400 Amp, Boenicke Audio W5 SE Speaker
Listen to Flac up to 24/192 kHz, Qobuz Hi-Fi Sublime+...
Random avatar
rost21A
Audiophile
Audiophile
 
Posts: 108
Joined: Tue Dec 17 2013 21:25
Location: Switzerland


ALLO Boss

Postby DipterePow » Thu Jul 18 2019 19:30

Hi,
Does the streamer work normally with a normal power supply on the RPI (+ BOSS)?

No. I've got the same "Alsa" error message.
If you supply the rpi and the BOSS separately with 5V, did you remove the connection Jumper J2.S on the BOSS next to the USB port?

Yes.
Which software version do you use?

The latest.
Is the BOSS Dac configured correctly in Volumio?

I tried all the configs: nothing works. I'm scared my DAC is Out of order... I would like to test with PSU connected to J19 5V and GND pins but i'm not sure it's a good idea...
Did you make adjustments in the software?

Yes but it didn't work at first launch. Before I make any changes. And I just added xinput at the moment(I try to flip my touchscreen).

Thanks a lot for your help

EDIT: The power LED is ON.
Last edited by DipterePow on Thu Jul 18 2019 19:40, edited 2 times in total.
User avatar
DipterePow
Sunday DIYer
Sunday DIYer
 
Posts: 49
Joined: Wed Mar 07 2018 08:42
Location: Under the old great tree. France.


ALLO Boss

Postby DipterePow » Thu Jul 18 2019 19:35

Here is my config.txt

Code: Select all
initramfs volumio.initrd
gpu_mem=32
max_usb_current=1
hdmi_group=2
hdmi_mode=87
hdmi_cvt 800 480 60 6 0 0 0
hdmi_drive=1
dtparam=audio=on
audio_pwm_mode=2
dtparam=i2c_arm=on
disable_splash=1
hdmi_force_hotplug=1
display_rotate=3

#### Volumio i2s setting below: do not alter ####
dtoverlay=allo-boss-dac-pcm512x-audio

User avatar
DipterePow
Sunday DIYer
Sunday DIYer
 
Posts: 49
Joined: Wed Mar 07 2018 08:42
Location: Under the old great tree. France.

Previous

Return to DACs

Who is online

Users browsing this forum: No registered users and 0 guests